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US Senator Ted Cruz (R-TX) poses for pictures with students shooting "selfies" after confirming his candidacy for the 2016 presidential election race during a speech at Liberty College in Lynchburg, Va., March 23, 2015.

Rubio, Cruz, and Paul launched with speeches and rallies, while Clinton launched by releasing a video on social media rather than an official event.

So which campaign launch generated the most buzz on Facebook, the world’s largest social network? Facebook provided msnbc with data on how much discussion each candidate’s announcement generated on the day of their official launch.

How do they stack up? Here’s a look at the numbers released by Facebook. So far, Hillary Clinton’s announcement generated the most buzz on its first day than any of the other campaign announcements.

Marco Rubio

695,000 U.S. Facebook users

1.3 million interactions (defined as likes, posts, comments, shares) related to Marco Rubio and his announcement.